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6 results for “Leptogium”
Data from: A revision of the Leptogium saturninum group in North America
A revision of the North American members of the Leptogium saturninum group (i.e. species with long lower-surface hairs, isidia, and usually smooth upper surface) is presented based on molecular phylogenetic analyses of mtSSU and nrITS sequence data, together with an extensive morphological study. Three species supported by both molecular and morphological characteristics are recognized: L. acadiense sp. nov. (distinguished by granular saturninum-type isidia, medulla composed of irregularly arranged or perpendicular hyphae), L. cookii sp. nov. (distinguished by cylindrical saturninum-type isidia) and L. hirsutum (distinguished by hirsutum-type isidia and medulla composed of loosely intertwined hyphae). One species supported by morphological characteristics, but for which no molecular data could be generated, is also recognized: L. compactum sp. nov. (distinguished by hirsutum-type isidia and medulla composed of tightly packed hyphae). Finally, L. saturninum (distinguished by granular saturninum-type isidia and medulla composed of perpendicular and parallel hyphae) is supported by morphological characteristics but molecular data from geographically diverse populations, including those near the type locality, indicate that the morphologically defined species is paraphyletic. Leptogium burnetiae is excluded from North American based on morphological study of the type. The species are described and illustrated in detail, and are distinguished morphologically by their isidium development, morphology of mature isidia, and pattern of hyphae in the medulla in transverse sections near lobe margins. A key to the members of the L. saturninum group and related species is also presented.
FIGURE 4. A–D. Leptogium species. A. L in Leptogium (Collemataceae, Peltigerales) from Mato Grosso do Sul state, Brazil: nine new records, three new taxa and a key for the species
FIGURE 4. A–D. Leptogium species. A. L. phyllocarpum (SML Souza 93). B–D. L. quilombensis (CM Bernardo 814, holotype). B. Detail of the thallus. C. Transversal section of the thallus, arrow = columnar hyphae. D. Transversal section of the apothecia, arrow = basal paraplectenchymatous tissue. Bars: 2 mm (A–B); 100 μm (C–D).
FIGURE 1. A–F. Leptogium species. A. L in Leptogium (Collemataceae, Peltigerales) from Mato Grosso do Sul state, Brazil: nine new records, three new taxa and a key for the species
FIGURE 1. A–F. Leptogium species. A. L. austroamericanum (TH Stefanello 79). B. L. chloromelum (SS Moura 111). C. L. cochleatum (VJ Pott 6281). D. L. coralloideum (TD Barbosa 672). E. L. cyanescens (SML Souza 133). F. L. cyanizum (LS Canêz 32423). Bars: 2 mm (A–F).
FIGURE 3. A–B. Leptogium species. A. L in Leptogium (Collemataceae, Peltigerales) from Mato Grosso do Sul state, Brazil: nine new records, three new taxa and a key for the species
FIGURE 3. A–B. Leptogium species. A. L. marginellum (AA Spielmann 8367). B. L. microcarpum (AL Simal 188). C. L. milligranum (SR Ramalho 44). D–F. Leptogium moluccanum var. denticulatum (CM Bernardo 465). D. Detail of the thallus. E. Transversal section of the thallus, arrows = columnar hyphae. F. Transversal section of the apothecia, arrow = subparaplectenchymatous parahymenium tissue. Bars: 2 mm (A–D); 50 μm (E); 100 μm (F).
FIGURE 2. A–F. Leptogium species. A. L in Leptogium (Collemataceae, Peltigerales) from Mato Grosso do Sul state, Brazil: nine new records, three new taxa and a key for the species
FIGURE 2. A–F. Leptogium species. A. L. diaphanum (LC Canêz 3246). B. L. fusisporum (NK Honda 050). C–E. L. hondae (JM Torres 509, holotype). C. Detail of the thallus. D. Transversal section of the thallus. E. Transversal section of the apothecia, arrow = cortex of thalline exciple. F. L. isidiosellum (SS Moura 112). Bars: 2 mm (A–C, F); 50 μm (D–E).
Data from: A revision of the Leptogium saturninum group in North America
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